EP2404088A1 - Labyrinth sealing bushing for a turbo machine and method for assembly of a labyrinth seal having said labyrinth sealing bushing - Google Patents
Labyrinth sealing bushing for a turbo machine and method for assembly of a labyrinth seal having said labyrinth sealing bushingInfo
- Publication number
- EP2404088A1 EP2404088A1 EP10709449A EP10709449A EP2404088A1 EP 2404088 A1 EP2404088 A1 EP 2404088A1 EP 10709449 A EP10709449 A EP 10709449A EP 10709449 A EP10709449 A EP 10709449A EP 2404088 A1 EP2404088 A1 EP 2404088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- labyrinth seal
- hole
- segment
- bushing
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/441—Free-space packings with floating ring
- F16J15/442—Free-space packings with floating ring segmented
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/445—Free-space packings with means for adjusting the clearance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
Definitions
- a turbomachine for example a steam turbine, has a housing and a rotor, which is rotatably mounted in the housing.
- the rotor has a shaft which is mounted at its longitudinal ends, each with a bearing which is provided outside the housing. Since the shaft moves relative to the housing during operation of the steam turbine, a gap is provided between the shaft and the housing so that the shaft can not touch the housing. Due to the overpressure of the steam within the housing, a leakage flow sets in through the gap. It is desirable to seal this gap as effectively as possible, so that the leakage is minimized.
- a contact-free seal is provided in the gap for reducing the leakage, for example.
- the width of the gap is essentially constant over time. It is desirable that the seal has the strongest possible sealing effect, so that the efficiency of the steam turbine is high.
- the seal in transient operating states, the
- these labyrinth seals are designed as a see-through seal or a tip-to-tip seal, which have a large radial clearance, so that the shaft seal housing with the built-in labyrinth seal can be mounted by sliding onto the shaft.
- the see-through gasket and the tip-to-tip seals have a poor sealing effect due to the large radial clearance, thereby impairing the efficiency of the steam turbine.
- Labyrinth seals are described, for example, in documents EP 1 243 755 and US Pat. No. 5,487,549.
- the object of the invention is to provide a labyrinth seal bushing for a turbomachine, a turbomachine with the labyrinth seal bushing and a method for assembling a labyrinth seal with the labyrinth seal bushing, wherein the turbomachine with the labyrinth seal bushing has a high efficiency.
- the inventive labyrinth seal bushing for a flow machine has a labyrinth seal support ring having on its inside a circumferential, radially inwardly extending flange and a labyrinth seal ring circumferentially composed of at least one segment, the segment of the labyrinth seal ring laterally abuts the flange radially displaceable, whereby the segment can be brought into an operating position and in an assembly position in which the segment is offset radially outward with respect to the operating position, and is supported on the labyrinth seal carrier ring with a biasing means biased radially inwardly, wherein the flange having an axially extending through hole and the labyrinth seal ring a plug hole which is arranged offset in the mounting position with the through hole and in the operating position relative to the through hole radially inwardly is, so that by means of a bolt which is inserted into the through hole and the plug-in hole, the segment is held in the mounting position and,
- the inventive method for mounting the labyrinth seal of the turbomachine comprises the steps of: providing the labyrinth seal bushing and the shaft with the sealing surface; Inserting the bolt into the through hole of the flange and the plug hole of the labyrinth seal ring, whereby the labyrinth seal ring is brought into the mounting position; Sliding the labyrinth seal bushing over the seal surface, disengaging the seal tips of the labyrinth seal ring and seal face stand; Extracting the bolt from the through hole of the flange and the plug hole of the labyrinth seal ring, whereby the labyrinth seal ring is brought by the biasing means in the operating position, so that the labyrinth sealing ring and the sealing surface form the labyrinth seal.
- the sealing tips of the segments in the labyrinth seal bushing are displaced radially outward for mounting the labyrinth seal bushing, in order to enable threading onto the sealing surface.
- the segments are moved radially inwards again, so that the labyrinth seal has a high sealing effect.
- the labyrinth seal has a low leakage rate, whereby the efficiency of the turbomachine is high.
- the radial movement of the segment is made possible in such a way that the bolt is inserted in the axial direction of the segment into the through-hole and the plug-in hole. For assembly, the segments are then through
- the labyrinth seal carrier ring preferably has on its inside a circumferential, radially inwardly extending, another flange which forms a groove with the one flange into which the labyrinth seal ring is inserted.
- the flanges preferably have mutually facing projections, so that the groove is formed as a T-slot, and the segment preferably has a radially outer and extending in the circumferential direction of the hammer head, which engages positively in the T-slot.
- a radial clearance of the hammer head is preferably defined such that the hammer head is supported at the bottom of the T-groove radially outward when the segment is in the mounting position, and is supported on the projections radially inwardly when the segment is in the operating position.
- the labyrinth seal support ring has on its inside a plurality of the flanges, which are arranged axially one behind the other and on each of which one of the labyrinth seal rings is provided, wherein the through holes of the flanges are arranged in alignment with each other and the plug holes in the labyrinth seal rings are formed as through holes, so that the bolt can be inserted axially through the successive through holes of the flanges and the associated plug holes of the labyrinth sealing rings.
- the through-hole of the flange is preferably provided with a releasable plug for closing the through-hole.
- a leakage flow can be established.
- the turbomachine is a steam turbine.
- the defined by the T-slot radial clearance is to be provided accordingly in the construction of the stuffing box of the steam turbine.
- FIG. 1 shows a longitudinal section of a longitudinal end region of the embodiment of the turbomachine according to the invention.
- Labyrinthdichtungsträ- gerrings 6 On the inside of Labyrinthdichtungsträ- gerrings 6, five, axially adjacent, circumferential T-grooves 8 are formed, in each of which a labyrinth seal ring 11 is inserted , Each labyrinth seal ring 11 has at its radially outer periphery a flange 7, which is formed in its cross section as a hammer head 14. The hammer head 14 engages in its T-slot 8 assigned to it, so that the labyrinth sealing ring 11 is fixed in the labyrinth seal carrier ring 6 in the radial direction both inwards and outwards. Distributed over the circumference of each labyrinth seal ring 11 is divided into several segments 12.
- the radial clearance is defined such that when the segments 12 are disposed radially inward, the segments 12 are in their operative position. If the segments 12 are arranged radially outward, then they are in their assembly position, whereby the sealing tips 13 are disengaged from the sealing surface 4. As a result, the labyrinth seal bushing 5 can be pushed over the sealing surface 4 without the sealing tips 13 tilting or taking damage.
- the through holes 16 and the plug holes 17 are arranged axially adjacent to each other, wherein the through holes 16 and the plug holes 17 are aligned with each other in the axial direction.
- the segments 12 are biased into the operating position 19, wherein the plug holes 17 are arranged offset slightly radially inwardly, compared with the radial position of the through holes 16.
- the radial offset of the through holes 16 and the plug holes 17 is art chosen that when a bolt 18 is inserted through the through holes 16 and the plug holes 17, the segments 1 are moved to the mounting position 20, wherein the through-centering action of the bolt 18, the through holes 16 and the plug holes 17 are exactly aligned with each other in the axial direction.
- the labyrinth seal bushing 5 can be axially displaced on the seal face 4 without the seal face 4 contacting the labyrinth seal bushing 5.
- the segments 12 move into their operating position 19, caused by the pretensioning force of the helical spring 15.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10709449.2A EP2404088B1 (en) | 2009-03-06 | 2010-02-23 | Labyrinth seal socket for a turbo machine and method for fitting a labyrinth seal with the socket |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09003322A EP2226535A1 (en) | 2009-03-06 | 2009-03-06 | Labyrinth seal socket for a turbo machine and method for fitting a labyrinth seal with the socket |
EP10709449.2A EP2404088B1 (en) | 2009-03-06 | 2010-02-23 | Labyrinth seal socket for a turbo machine and method for fitting a labyrinth seal with the socket |
PCT/EP2010/052238 WO2010100053A1 (en) | 2009-03-06 | 2010-02-23 | Labyrinth sealing bushing for a turbo machine and method for assembly of a labyrinth seal having said labyrinth sealing bushing |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2404088A1 true EP2404088A1 (en) | 2012-01-11 |
EP2404088B1 EP2404088B1 (en) | 2013-07-03 |
Family
ID=40765753
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09003322A Withdrawn EP2226535A1 (en) | 2009-03-06 | 2009-03-06 | Labyrinth seal socket for a turbo machine and method for fitting a labyrinth seal with the socket |
EP10709449.2A Not-in-force EP2404088B1 (en) | 2009-03-06 | 2010-02-23 | Labyrinth seal socket for a turbo machine and method for fitting a labyrinth seal with the socket |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09003322A Withdrawn EP2226535A1 (en) | 2009-03-06 | 2009-03-06 | Labyrinth seal socket for a turbo machine and method for fitting a labyrinth seal with the socket |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP2226535A1 (en) |
CN (1) | CN102341628B (en) |
WO (1) | WO2010100053A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105545373B (en) * | 2016-02-05 | 2017-05-10 | 中国船舶重工集团公司第七�三研究所 | High-back-pressure turbine end vapor seal capable of being rapidly detached |
WO2020176339A1 (en) * | 2019-02-25 | 2020-09-03 | Danfoss A/S | Abradable labyrinth seal for refrigerant compressors |
EP3741964A1 (en) * | 2019-05-21 | 2020-11-25 | Siemens Aktiengesellschaft | Assembly and method for fixing a segment to a component |
CN114060104B (en) * | 2021-11-10 | 2023-12-19 | 北京动力机械研究所 | Stepped high-reliability long-service-life sealing structure for rotor of turbocharging system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5487549A (en) * | 1994-10-24 | 1996-01-30 | Demag Delaval Turbomachinery Corp. Turbocare Division | Turbine interfitting packing with cam adjustment |
US5498006A (en) * | 1995-05-12 | 1996-03-12 | Inpro Companies, Inc. | Pinned unitary bearing seal |
CN2253777Y (en) * | 1996-02-15 | 1997-05-07 | 茅润霖 | Brush type gland sealing capable of automatic adjusting gap |
EP1243755A1 (en) * | 2001-03-16 | 2002-09-25 | Ronald E. Brandon | Elastic fluid turbine employing a sealing ring |
CN2498408Y (en) * | 2001-09-19 | 2002-07-03 | 左俊业 | Floated labyrinth spiral composite sealer |
US7201560B2 (en) * | 2004-12-06 | 2007-04-10 | General Electric Company | Mounting structure for a packing ring seal segment in a turbine |
-
2009
- 2009-03-06 EP EP09003322A patent/EP2226535A1/en not_active Withdrawn
-
2010
- 2010-02-23 WO PCT/EP2010/052238 patent/WO2010100053A1/en active Application Filing
- 2010-02-23 CN CN201080010808.8A patent/CN102341628B/en not_active Expired - Fee Related
- 2010-02-23 EP EP10709449.2A patent/EP2404088B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2010100053A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102341628B (en) | 2014-09-10 |
EP2404088B1 (en) | 2013-07-03 |
WO2010100053A1 (en) | 2010-09-10 |
EP2226535A1 (en) | 2010-09-08 |
CN102341628A (en) | 2012-02-01 |
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